问题
单项选择题
根据《合同法》的规定，合同生效后，当事人发现合同对价款的约定不明确的，首先应当采用（）确定。
A.协议补充的方法
B.交易习惯
C.订立合同时履行地
D.合同有关条款
答案
参考答案：A
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根据《合同法》的规定，合同生效后，当事人发现合同对价款的约定不明确的，首先应当采用（）确定。
A.协议补充的方法
B.交易习惯
C.订立合同时履行地
D.合同有关条款
参考答案：A
Which of the following statement is closest in meaning to the passage you have just heard
A．The WTO ministerial conference held at Cancun is disappointing because the poor countries could not participate in the event.
B．The Cancun ministerial meeting was intended to create a more open and equitable trading system.
C．The main objective of the Cancun conference was to help the poorest countries in the world to develop their economy.
D．Opening up the market in poor countries would have a negative impact on their national economic development.